jquery.loadmask.js not working in IE 8?

jquery.loadmask.js not working in IE 8?

I have implemented a simple load mask on a confirm page.  It works fine in firefox 3.6 but will not work in IE 8.  The mask appears but the page never gets submitted and it just spins in IE!  I'm sure its a simple fix.  I am very new to jquery so any advise would be great!  Thanks.

<link type="text/css" media="screen" rel="stylesheet" href="assets/css/jquery/jquery.loadmask.css" />
<script type="text/javascript" src="assets/js/jquery/jquery.js"></script>
<script type="text/javascript" src="assets/js/jquery/jquery.loadmask.js"></script>

<div id="confirmForm">
<form action="./" method="post" name="confirmForm" id="confirmForm">
<input type="hidden" name="event" value="cart.submit"/>
<p align="center"><strong>Complete your order</strong></p>
<p align="center">By clicking the 'submit order' button below your credit card will be charged and your order will be submitted</p>
<input type="submit" value="Submit Order" id="submitButton" name="submit">
<input type="button" value="back" name="back" id="backButton" onclick="history.back()">
</form>
</div>

<script type="text/javascript">
$(document).ready(function(){
$("#submitButton").bind("click", function () {       
$('#confirmForm').mask('Processing...');
$('#submitButton').attr('disabled', true);
$('#backButton').attr('disabled', true);       
});
});
</script>